Claremont, NH 05151 Frost Dates
Claremont, NH: when does the frost end?
Around 05/13 is the usual last spring frost, about 258 days away. Fall's first freeze usually shows up around 10/03, roughly 143 days after the last spring frost.
Claremont sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Claremont's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Claremont against the rest of the dataset
About 143 days separate Claremont's last and first frost, putting it 36,504 of 40,283 ZIP codes nationally. Within NH, it ranks 175 of 260.
Learn more
Before leaning on 05151's figures: the frost range explains how to read the range around Claremont's dates instead of trusting one, while local microclimates explains what one yard in Claremont can differ from the 05151 normal.